Wire stringing device



Oct. 7, 1952 H. c. THOMAS WIRE STRINGING DEVICE Filed Feb. 10, 1950 HENRY 0- THOMAS Aria/nay Patented Oct. 7, 1952 uNi Eo STATES PATENT OFFICE 2,613,256 WIRE STRINGING DEVICE Henry C. Thomas, Orangeburg, S. (3. Application February Ill, 1950, Serial No. 145A=20 7 (or. 175-376) V 6 Claims.

This invention relates to a device for. facilitating the stringing and sagging in of the wires of a transmission line, that is, a device for supporting the Wire during the stringing and sagging in of the wire in such manner that the sagged wire may be readily placed upon the insulator. 'I'he invention is especially useful at locations where the-transmission line changes direction.

It is-an object of this invention to, provide a wire stringing and saggingdevice which may be easily mounted in and removed from its working "position adjacent the insulators which are to support the wire.

' Another object of this invention is to provide an improved wire support for use in stringing and sagging in of transmission lines, the sup-port supports the insulators, but such devices cannot be used on pole-mounted insulators. Also, at a location where the linechanges direction, these devices cannot be used on the end of the crossarm extending to the outside of the bend because the arm does not extend far enough beyond the insulator to provide a-seat for the device. A further object of this invention is to provide a wire stringing and sagging device which, instead of being clamped to the cross-arm, is clampedto the insulator supporting pinsbelow the insulators and supports'the wire in such position in respect to the top of the insulator that the strung and .sagged in wire may be easily placed on the insulator. Accordingly, my device is useful on both pole-mounted and cross-arm mounted insulators] v 7 Other and further objects of this invention will be apparent to those skilled in the art to which it relates from the following specification, claims and drawing. a i

In accordance with this invention there is provided an improved device for facilitating the stringing and sagging in of the wires or cables of a transmission line. This device consists of a wire or cable supporting pulley that is mountedupon a bracket-like device clamped to a pair of insulator pins mounted on a cross-arm or a pole top. Thewire or cable supported by the pulley is .free to move forward or backward while sagging in so that the sag in adjacent spans is equalized. After the transmission wire or cable is sagged to the proper amount the pulleysupporting it is moved by adjustment of a hand wheel so that the wire or cable is moved toward the top of the insulator or insulators on the cross-arm or pole top. The wire may then be fastened to the insulators and the stringing device may be removed by loosening the clamp.

Referring to the drawing briefly:

Fig. 1 is a plan view of this device clamped to a pair of pole-mounted insulator pins, showing the wire being strung and sagged in, positioned on the pulley thereof; 7

Fig. 2 is a side elevational view of the arrangement shown in Fig. l; v

Fig. 3 is a front view of the pulley-supporting bracket of the device.

In the drawing my wire stringing device is illustrated as applied to a pair of pole-mounted insulators located on a pole at a point where the transmission line changes direction. It will be understood, however, that the insulators may be supported at one end of the usual double crossarm. As shown, a pair of insulators 4 and 5 are mounted on opposite sides of a pole 6 by a pair of insulator pins 7 and B secured on opposite sides of the pole and extending above the top of the pole. The transmission wire or cable is shown at 9. i The wire stringing device is supported upon the insulator pins 1 and 8 by a clamp formed of an angle iron 10 and a channel iron I l arranged in parallel relation on opposite sidesof pins 1 and 8. These iron members ill and II are clamped to the insulator pins 7 and 8 a short distance below the insulators by the bolt 13 carrying threaded hand wheel E5. The bolt I3 is provided with a head [4, the inside surface of which is made somewhat arcuate so as to engage adjacent surfaces of the angle iron I0 at a slight angle when this angle iron is clamped against the tapered portion of the insulator pins. The hand Wheel [5 of the bolt l3 engages the insert I! that is welded into the central portion of the channel iron I 1. Another plate 13 is welded to the central portion of the bottom edge of the angle iron l0 and extends under the channel iron II to support and hold this channel iron substantially parallel to the angle iron during the clamping of this device on the insulator pins.

The pulley-supporting bracket is formed of a pair of arms I9 and 20 welded to the angle iron H) to form a braced support for the eye bolt 2|, hand Wheel 22, clevis 23 and the pulley 24. The arms 1 9 and 29 are made of a curved configuration so that they extend out and away from the angle iron Ill in a substantially horizontal direction for a short distance and then curve upwardlyto support the plate 25 to which the outer ends of arms 19 and 29 are attached. The 1ate'25 is provided with a hole 26 for receiving the eye bolt 2! and this hole is positioned above the plane of the top of the insulator so that the pulley 24 will support the wire 9 being strung and sagged in, to one side of and somewhat above the pulley 24 is moved away from the insulators as far as the arms I9 and 20 will permit. The wire or cable 9 is strung on a number of poles and is placed in the pulley 24 and is allowed tomove freely in this pulley so that it assumes equal sagging in adjacent spans. After the wire. or cable is sagged in, the hand wheel 22 is rotated to per,-

mit the pulley 24 to move toward the insulators 1" and 8 so that the wire maybe easily placed into the circular grooves of theseinsulators. Pulley 24 is sufliciently small so that it can enter the space between the'twoinsulators without damaging them. After tying the wire 9'to the insulators, the device is then removed from the pins simply by loosening the hand wheel l5, without-interferring with the wire 9.

It will be understood that my; device -may be used at insulator locations where the line is straight, and in this case the transmission conductor will be located in the transverse groove 4b formed in the tops of the insulators.

While there has been described a preferred embodiment of this invention in the foregoing-specification, it is not desired to limit this invention to the exact details described and illustrated except in so far as those detailed ,are defined bythe appended claims.

I' claim:

1. A device for stringing and sagging in wires comprising a pair of elongated clamp members, said members being of substantially the same length, clamping means joining said member, for clamping said membersto a. pair of spaced in.- sulator supporting pins beneath theinsulators, a bracket extending. outwardly from the midportion of one of saidclamp members and having the-free end thereof extending upwardly beyond the upper ends of said insulators, a groovedpulley for supporting the wire to be sagged in, a pulley support including means for mounting said pulley for rotation on itsaxis, adjustable means supporting said pulley support from. the. upper end of'said' bracket and in a position'such that said pulley is located to one side of said insulator pins and substantiallyequidistant therefrom, said adjustable supporting means providing for movement of said pulley in substantially; a horizontal direction to enter the space between the tops of said insulators.

2., A device according; to claim 1 wherein said clamping means comprises a threaded bolt mounted at the center of said clamp member carrying said bracket and extending through a hole. formed at the center ofthe other-clamp member, and a hand wheel threaded on the outer end of said bolt.

3'. A device according to claim 1 wherein said adjustable means for supporting said pulley comprises a threaded bolt secured to said pulley supportand extending through a hole formed in the upper end portion of said bracket, and a hand wheel threaded on the outer end of said bolt.

4. Aidevice for stringing and sagging in wires comprising a pair of elongated clamp members, said members being of substantially the same length and having holes formed therethrough substantially in the centers thereof, a bolt positioned in said holes to clamp said members to insulator supporting pins arranged in spaced relation, a pair of arms each having one end attached to one of said members and extending away therefrom, a plate, the other ends of said arms being, atta-ched-t said plate -to support said plate in braced relation a wire receiving pulley, means attached to said plate for supporting said pulley so that the wire being strung may be readily placed on or lifted from saidpulley, and means for adjusting said last mentioned means so that said pulley may be movedalong a path substantially midway between thetops, of the insulators supported on said pinsand the sagged wire may be placed to rest within the grooves of said insulators.

5. A device for stringing and sagging in wires comprising an angle iron member,- a. channel iron member, said membersbeing of 1' substantially the. same length and having; holes =formed therethrough substantially in the. centers. there.- of, abolt positioned in said'holesto clamp. said members to spaced L insulator supporting pins. a pair of arms each-having one endattached to said anglei-ron member. and extending-. -away therefrom, a plate, the other'ends of said arms being attached to said plate-to supportsaid plate in braced relation, a wirereceiving pulley, means attached to said platefor supporting-said pulley so that the wire may be read-ily-placedon or liftedfrom said pulley, and means for adjusting-the positionor said pulley along .-a' path passing substantially midway between the tops of said insulators.

6. A device for stringing and sagging inwires comprising an angle iron member, a channel iron member, said members being-of substantially the same length and 'having-holes'rormed therethrough substantially in the centers -there of, abol-t positioned-in said holes to clamp-said members tospaced insulator supporting pins; a pair of armseachhaving one end-attached-to said angle iron member and extending" away therefrom, aplate havingan aperture; the other ends ofsaid'arms-being attached to-s aid;plate to'support said plate in'braced-relation, an eye bolt passing through the aperture of'said plate. a Wire receiving pulley, a clevis supported by the inner end'of said eye bolt, means'attached to said clevis for supporting said pulley so th-atthe wire may be readily placed on orliftedfrom said pulley, and a hand wheel threaded on the outer end of said eye bolt so thatsaid; pulley may be moved into the space between the tops of the insulators and the sagged wire may be 1pliced to rest within the groovesv of said; insua ors.

c. THOMAS;

REFERENCES CITED Thefollowing references are of, record inthe file of this patent:

UNITED STATES: PATENTS Number Name Date 461,109 Ball Oct. 13;,1891 1,235,999 Neeley Aug. 7,1917 2,174,429 Taylor Sept. 26, 1939 2,202,184 Berger May 28,1940 2,213,604 Lennert Sept.- 3, 1940 2,312,054- Dyer Feb, 23, 1943 2,428,186 Warwick Sept. 30,1947

FOREIGN PATENTS Number Country Date 244,574 Italy Dec.- 14; 1925 

